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Published on July 14th, 2026
Updated on July 16th, 2026

Whether your vet just prescribed something new or you're looking for a convenient way to fill an ongoing medication, the Petco online pharmacy, fulfilled by Vetsource, makes the process straightforward.
Whether your vet just prescribed something new or you're looking for a convenient way to fill an ongoing medication, the Petco online pharmacy, fulfilled by Vetsource, makes the process straightforward. We can fill prescriptions from any vet, Petco or independent, when you order through the Petco Pharmacy. Here's a simple walkthrough of your options — online, by mail, or in-store — so you can choose what works best for you and your pet.
Regardless of which method you choose, you'll need a few things ready:
Prescriptions fulfilled through the Petco Pharmacy are processed in partnership with Vetsource, our trusted veterinary pharmacy partner. All medications are sourced from manufacturer-approved distributors.
This is the most popular option and requires the least effort on your part.
If your vet has given you a paper prescription, you can mail it directly to Vetsource, Petco’s Pharmacy partner. This is required if your Veterinarian only provides written or paper prescriptions.
Once received, your order will typically be processed within 1–2 business days. Do not mail your prescription in before you have placed an order and have an order number assigned.
Prefer to pick up in person? Many Petco locations with a veterinary hospital can assist with prescription fulfillment in-store if you are a patient with an existing Vet-client-relationship (VCPR). We recommend calling your direct Vetco location before arriving.
Tip: If your pet was just seen at Petco, let the vet team know you’d like to bring home the product today or schedule to pick up on a date in the near future.
Once your prescription is on file with Petco, managing refills is simple:
If your prescription has expired or your vet doesn't approve a renewal, you'll receive an email notification with instructions on if you need to book a new appointment. A quick call to your vet or a Vetco visit can get things back on track.
New to the Petco Pharmacy? Creating an account at petco.com takes just a few minutes and makes managing your pet's medications, refills, and delivery schedule much easier going forward.
Your Petco veterinarian can prescribe veterinary diet and necessary medications at your appointment. Fill your prescription in-store or online through Petco with Autoship, so staying on schedule is one less thing to think about. Our Vetco Total Care hospital and Vetco Vaccination Clinic prescriptions automatically transfer to your Petco profile. If you’re not a Petco veterinary customer, it’s still easy to order online. Simply select contact my vet at checkout or upload a photo of your veterinary diet prescription for quick and easy validation. If you need the food today, consider Petco’s new buy online pickup in store option for veterinary diet products.